We are using mouse emulation with a qt (5.6) application and it works for us.
We are using these 2 functions:
lError = zcSetMouseEmulationTarget(mzSpaceContext, mStylusHandle);
lError = zcSetMouseEmulationEnabled(mzSpaceContext, true);
Does the SDK sample work? if yes, check if you only have one sdk instance installed, we had issues with mouse emulation with remaining sdk folders.